USCG Exam PracticeApplying tide corrections to charted depth
A vessel is transiting a foreign port and cannot obtain US Government charts. Under 33 CFR §164.33, which condition must a foreign government chart meet to be an acceptable substitute?
- A. It must be published within the past two years and show soundings in metres.
- ✓ It must be of large enough scale, have enough detail for safe navigation, and be currently corrected.Correct
- C. It must be approved by the National Ocean Service before departure.
- D. It must include tidal current data equivalent to NOS tidal current tables.
Why B is correct
33 CFR §164.33(b) permits substitution of foreign government charts provided the chart is of large enough scale, has enough detail to make safe navigation possible, and is currently corrected. There is no requirement for NOS approval or a specific publication date.
Cited:33 CFR §164.33